RECON: TNO occultation with 134340

Event between (134340) Pluto and star UC4-340-189913 with event index number of 203487

Geocentric closest approach at 2019/07/26 11:29:19 UTC

J2000 position of star is 19:32:31.5 -22:10:50
Equinox of date position of star is 19:33:35.6 -22:08:28
Stellar brightness R=16.5, use SENSEUP=128
Star is 118 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=14.5

TNO is 33.8 AU from the Sun and 32.9 AU from the Earth.
The TNO is moving 23.6 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 51 seconds.
The 1-sigma cross-track error in the shadow position is 1192 km.

The TNO has an absolute magnitude Hv=-0.8
Diameter=8551.0 km assuming a 5% albedo -- 362.3 sec chord
Diameter=3490.9 km assuming a 30% albedo -- 147.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 134340, (2019/07/26 11:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.6 -26:28:26  0.9 41.72 158
Nunki          18:56:28.6 -26:16:15  2.0  9.43 127
50 Sgr         19:27:29.1 -21:44:11  5.6  1.49 120
PPM 269971     19:35:17.3 -22:03:39  8.4  0.38 118
PPM 269942     19:34:06.1 -21:57:27  9.0  0.20 118
134340         19:33:41.4 -22:08:15 16.5       118
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 134340, (2019/07/26 11:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 41.72 158
Nunki          18:55:15.9 -26:17:49  2.0  9.43 127
50 Sgr         19:26:19.2 -21:46:36  5.6  1.49 120
PPM 269971     19:34:07.4 -22:06:16  8.4  0.38 118
PPM 269942     19:32:56.2 -22:00:02  9.0  0.20 118
134340         19:32:31.5 -22:10:50 16.5       118
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:09:57 UT

Marc W. Buie, Southwest Research Institute

RECON